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34 lines
640 B
34 lines
640 B
package bom
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import (
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"bytes"
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"io"
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"io/ioutil"
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)
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const (
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bom0 = 0xef
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bom1 = 0xbb
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bom2 = 0xbf
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)
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// CleanBom returns b with the 3 byte BOM stripped off the front if it is present.
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// If the BOM is not present, then b is returned.
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func CleanBom(b []byte) []byte {
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if len(b) >= 3 &&
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b[0] == bom0 &&
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b[1] == bom1 &&
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b[2] == bom2 {
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return b[3:]
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}
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return b
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}
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// NewReaderWithoutBom returns an io.Reader that will skip over initial UTF-8 byte order marks.
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func NewReaderWithoutBom(r io.Reader) (io.Reader, error) {
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bs, err := ioutil.ReadAll(r)
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if err != nil {
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return nil, err
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}
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return bytes.NewReader(CleanBom(bs)), nil
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}
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